Southwark Metal ATD_12IN Duct Takeoff with Damper 12 in

Product Description

The SOUTHWARK METAL ATD_12IN is a 12-inch diameter, Air-Tite sheet metal duct takeoff with an integrated damper, fabricated from hot dip galvanized steel. It connects branch duct runs to a main trunk or plenum, allowing airflow to be directed and regulated at the branch point. The built-in damper enables on-site balancing of air distribution without the need for a separate balancing device. This fitting is installed by licensed HVAC technicians during new construction or retrofit ductwork projects where precise air balancing is required.

The ATD_12IN is suited for residential and light commercial forced-air HVAC systems. It is used in supply duct systems where a branch takeoff must be made from a rectangular or round main trunk. The Air-Tite construction minimizes air leakage at the fitting, supporting system efficiency and helping meet duct leakage targets required by modern energy codes. The integrated damper makes it practical for multi-zone and variable-airflow applications where individual branch balancing is part of the design.

Key Features

• 12-inch diameter opening sized for standard round branch duct connections
• Integrated damper allows airflow balancing at the takeoff point without additional hardware
• Hot dip galvanized steel construction resists corrosion in attic, crawlspace, and mechanical room environments
• Air-Tite design reduces duct leakage at the branch connection
• Meets ACCA and SMACNA applicable standards for sheet metal ductwork fittings

Compatibility

Designed as an OEM-style sheet metal fitting for use in residential and light commercial forced-air duct systems requiring a 12-inch diameter branch takeoff with damper control.

Installation Notes

Installation is performed by qualified HVAC technicians in accordance with SMACNA duct construction standards and local mechanical codes. Shut down and lock out the air handling equipment before cutting into or connecting to an existing trunk line. Secure the fitting with sheet metal screws and seal all joints with UL 181-rated mastic or foil tape to maintain the Air-Tite performance of the assembly. Set the damper position during system commissioning as part of the air balancing procedure.

Technical Specifications

• Diameter: 12 inches
• Material: Hot Dip Galvanized Steel
• Type: Air-Tite Duct Takeoff
• Inclusions: Integrated Damper
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: ATD_12IN